Planting techniques of heat-resistant crowbar chrysanthemum

Chrysanthemum morifolium is also called chrysanthemum and chrysanthemum morifolium is also called stem chrysanthemum. It is rich in nutrition, unique in flavor and excellent in quality, and is deeply loved by people. Chrysanthemum has strong adaptability, fast growth and considerable economic benefits. The main cultivation techniques are introduced as follows.

First, soil preparation and fertilization

Because Artemisia argyi has high planting density, fast growth and shallow roots, it needs fine soil preparation, and the combined soil preparation is every 667m2.

Apply 3000-3500 kg of decomposed organic fertilizer. In continuous cropping, the fields should be cleared after the previous harvest, and the soil should be disinfected by spraying 50% phoxim 1000 times.

Second, sow.

Spring planting is usually in March-April, autumn planting is in August-September, and winter planting is in11-February. Chrysanthemums can be planted by sowing or drilling. After sowing, soil should be covered with 1 cm, and autumn seeds should be covered with sunshade net to keep soil moisture, which is beneficial to rapid seedling emergence.

Third, on-site management

1, water and fertilizer management. After the seedlings are unearthed, they should be watered, and the watering time and frequency should be flexibly controlled to keep the soil moist. Topdressing 1 available nitrogen fertilizer 1 time 10- 15 five days before each harvest, and applying potassium nitrate 15 kg and 8 kg of urea per mu.

2. Temperature management. The optimum temperature for Artemisia scoparia growth is 15 ~ 20℃ in the daytime and 10 ~ 15℃ at night. In order to promote the quality and high yield of Artemisia annua, it is necessary to adopt heat preservation measures and multi-layer mulching in greenhouse cultivation in winter.

3. Weeding in the sowing room. When the seedlings grow to about 10 cm, pull out 3-5 cm square according to the plant spacing, and remove weeds at the same time.

4. Pest control. Artemisia annua has a special fragrance and few pests and diseases. The main disease is downy mildew, which can be controlled by spraying 45% chlorothalonil aerosol, 72% clothianidin 800 times solution or 50% dimethomorph 2000 times solution.

5. Harvest. 35-50 days after sowing, the plant height is 25-35 cm, and when the upper and lower leaves and stems are bright green and crisp, it is the most suitable harvesting time for Artemisia annua, with high yield and good quality.